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      Knowledge is Power

      Scientific American February 1925

      Which Races Are Best?

      The First Article of a Series on Immigration

      • By Albert A. Hopkins on February 1, 1925

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      More in the February 1925 issue of Scientific American
      • Learning to Use Our Wings, February 1925
      • Science Notes, February 1925
      • Some Radio Mysteries Which the Eclipse Investigation May Help to Explain
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